Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cfd0a8d03f59dfb…

MALICIOUS

PDF

67.2 KB Created: 2020-12-15 23:20:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ed35e6471c5829a6879b3e41b9113466 SHA-1: 118a9fad5b9e750a22ba55159e44e302699397e0 SHA-256: 3cfd0a8d03f59dfbe00f993e8d643ab1fbbd3e454a1c8a1b5219443075f5cebf
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://trafffi.ru/strik?utm_term=scout+stereotypes+to+kill+a+mockingbird PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4388426/normal_5fcdaab8b1566.pdfIn PDF document text
    • https://xurufujes.weebly.com/uploads/1/3/4/8/134864067/vigidekanimuduriwadi.pdfIn PDF document text
    • https://zukedobawalot.weebly.com/uploads/1/3/4/5/134526307/bopadatiketaku.pdfIn PDF document text
    • https://fuzedefona.weebly.com/uploads/1/3/4/5/134578490/7bf06b4c5.pdfIn PDF document text
    • https://nidixinaxob.weebly.com/uploads/1/3/0/7/130739699/xuxedupif.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fec85a3c-1da8-4a93-b2f3-dff60922da41/webesoxivebinowojetav.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce2aaab9ec03672fa809a7/t/5fd6fb67313c42342ba3233f/1607924588606/filmora_9_slideshow_template.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1012fe5c7695ca99c31f6/t/5fc1d3f4cb3e0f5771932c5b/1606538228284/college_board_ap_id_number.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcefdab474932ca2664ce3/1606217691216/y_linked_traits_pedigree.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5f7efa04221c7117e003/1606377343855/binary_fission_and_mitosis_in_eukaryotic_cells.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6d6f248c1673e559912ec/t/5fd1a605ebc7ce75e8aefff5/1607575046175/happy_wheels_download_full_game_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f0de5bcb0228a282afe8/t/5fc22077eaf37e3b64e46fbe/1606557815311/48hour_xbox_live_codes.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCABA 5804 bytes
SHA-256: 52d6465c5beb8666599aecf750fc5e909d139cd8bca47007d4a311e2dcbe95bc
font_01_sfnt_off0000de68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE68 9936 bytes
SHA-256: cb4a083ca5d989b26b50d157ad2fcd5ef9a68f7212eced4b5afad13bc03c92ea

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